Improvement in Bridges. Page: 2 of 2
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UNITED STATES PATENT OFFICE.
BENJAMIN F. DAVIS, OF HFARNE, TEXAS.
IMPROVEMENT IN BRIDGES.
Specification forming part of Letters Patent No. 143,125, dated September 23, 1873; application filed
May 26, 1873.To all whom it nay concern:
Be it known that I, BENJA mrIN F. I)DAVs,
of Hearne, in the county of Robertson and
State of Texas, have invented a new and use-
ful Improvement in Bridges and Self-Support-
ing Roofs and Girders; and I do hereby de-
clare the following to be a full, clear, and ex-
act description of the same, reference being
had to the accompanying drawing forming
part of this specification, in which--
Figure 1 is an elevation, aid Fig. 2 is a
cross-section.
The invention relates to the construction
of truss-bridges and self-supporting roofs and
girders, and will be first described in connec-
tion with all that is necessary to a fill under-
standing thereof, and then clearly pointed out
in the claim.
In the drawing, A. represents the main chords
of a bridge, and B the arches or bows, both
formed by nailing or bolting securely together
successive layers of planks joined at different
points. To fasten securely together the ends
of the bows and chords, large wedge-shaped
pieces G, of timber or hollow metal, are used,
to which the layers of planks are nailed or
bolted firmly by as many large nails or bolts
as can be used without seriously injuring anddestroying the wood, the layers forming the
chords, and arches extend beyond the points
of the wedges, and the ends of the successive
layers of the arches are securely nailed to the
top planks of the chords. As additional se-
curities, heavy metallic bands D D and iron
bolts C C hold rigidly chords and arches, and
braces E and F are extended from chords
to arches in the manner shown in drawing.
These braces are held rigidly to prevent
swaging or springing by studding I wherever
necessary; and the ends of these braces are
secured to chords and arches by being bolted
to wedge-shaped pieces II, of timber or metal
secured to the chords and arches.
Having thus described my invention, what
I claim as new, and desire to secure by Let-
ters Patent, is--
The combination of chords and arches A B
made of successive layers of planks, the end
wedges G G, the bands I, the braces E F, and
the studding I, as and for the purpose de-
scribed.
BENJAMIN F. DAVIS.
Witnesses:
J.W. TIRMIDn
W. A. ADaJ S.
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Davis, Benjamin F. Improvement in Bridges., patent, September 23, 1873; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166889/m1/2/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.